On the comparison of three numerical methods applied to building simulation: Finite-differences, RC

来源 :建筑模拟(英文版) | 被引量 : 0次 | 上传用户:xurikeji
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Predictions of physical phenomena in buildings are carried out by using physical models formulated as a mathematical problem and solved by means of numerical methods, aiming at evaluating, for instance, the building thermal or hygrothermal performance by calculating distributions and fluxes of heat and moisture transfer. Therefore, the choice of the numerical method is crucial since it is a compromise among (i) the solution accuracy, (ii) the computational cost to obtain the solution and (iii) the complexity of the method implementation. An efficient numerical method enables to compute an accurate solution with a minimum computational run time (CPU). On that account, this article brings an investigation on the performance of three numerical methods. The first one is the standard and widely used finite-difference approach, while the second one is the so-called RC approach, which is a particular method brought to the building physics area by means of an analogy of electric circuits. The third numerical method is the spectral one, which has been recently proposed to solve nonlinear diffusive problems in building physics. The three methods are evaluated in terms of accuracy on the assessment of the dependent variable (temperature or vapor pressure) or of density of fluxes for three different cases: (i) heat diffusion through a concrete slab, (ii) moisture diffusion through an aerated concrete slab and (iii) heat diffusion using measured temperatures as boundary conditions. Results highlight the spectral approach as the most accurate method. The RC based model with a few number of resistances does not provide accurate results for temperature and vapor pressure distributions neither to flux densities nor conduction loads.
其他文献
起自牡丹江市终至佳木斯市的牡佳客专,是国家“十二五”规划的铁路工程之一.中铁五局机械化公司承建的牡佳客专二标线路全长18.943千米,合同总造价约5.81亿元.
期刊
党的十八大勾画了全面建成小康社会的美好蓝图,吹响了深化改革的号角,民族复兴的“中国梦”引领亿万人民开拓奋斗.事业的成败,关键在人,关键在党员干部.大庆油田有限责任公司
期刊
近年来,网易开始打造云音乐课堂新模式,云音乐课堂涉及到乐理基础知识、声乐唱歌、乐器学习、编曲创作等多项内容,这使得网易商业模式发生了新的变化,探索出了商业化运营新模
期刊
2020年的第一天,室外气温零下二十多摄氏度,大庆采油一厂(以下简称“采油一厂”)的井场上却是热浪滚滚,红衣穿梭.她孕育的“三老四严”精神,成为了大庆人的精神底色.采油一厂
期刊
国有企业基层党组织是党组织在国有企业中发展的最终端,承担着宣传贯彻、执行落实党的决策部署、推动企业改革发展的重要使命.在新时代推动全面从严治党向基层不断延伸的背景
期刊
通过认真落实抓关键、抓保障、抓协调、抓阵地、抓服务这“五个抓手”,大庆油田第八采油厂离退休职工管理中心在2019年工作中积极做好退休、家属、协解人员这“三大群体”的
期刊
企业民主管理是基层民主建设的重要内容,是深入贯彻落实党的群众路线的必然要求.习近平总书记指出:“忘记了人民,脱离了人民,我们就会成为无源之水、无本之木,就会一事无成.
期刊
伴随着中国特色社会主义建设步伐的加快,当今中国经济呈现出高速发展态势,石油企业迫切需要更新观念,强化管理,以适应形势发展的变化,切实肩负起维护国家石油安全的历史重任.
期刊
在新时代新形势下,国有企业加强基层党组织建设,是落实党中央路线、方针、政策以及上级各项决策部署的必然要求,也是推动国有企业改革发展的根本路径,关系着国有企业高质量发
期刊
具有大球面及完整球面工作空间的球面并联机构是大角域工作空间应用领域研究的重要方向之一.针对当前球面并联机构存在工作空间不足的问题,基于双摇杆机构输入与输出差异化的